/*
 * Copyright (C) 2010 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.zxing.client.android;

import android.graphics.Bitmap;

import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.PlanarYUVLuminanceSource;
import com.google.zxing.ReaderException;
import com.google.zxing.Result;
import com.google.zxing.common.HybridBinarizer;

import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.util.Log;

import java.util.Map;

import kr.co.bettersoft.waitnumberstorem.activity.R;


final class DecodeHandler extends Handler {

  private static final String TAG = DecodeHandler.class.getSimpleName();

  private final CaptureActivity activity;
  private final MultiFormatReader multiFormatReader;
  private boolean running = true;

  DecodeHandler(CaptureActivity activity, Map<DecodeHintType,Object> hints) {
    multiFormatReader = new MultiFormatReader();
    multiFormatReader.setHints(hints);
    this.activity = activity;
  }

  @Override
  public void handleMessage(Message message) {
    if (!running) {
      return;
    }
    switch (message.what) {
      case R.id.decode:
        decode((byte[]) message.obj, message.arg1, message.arg2);
        break;
      case R.id.quit:
        running = false;
        Looper.myLooper().quit();
        break;
    }
  }

  /**
   * Decode the data within the viewfinder rectangle, and time how long it took. For efficiency,
   * reuse the same reader objects from one decode to the next.
   *
   * @param data   The YUV preview frame.
   * @param width  The width of the preview frame.
   * @param height The height of the preview frame.
   */
  private void decode(byte[] data, int width, int height) {
    long start = System.currentTimeMillis();
    Result rawResult = null;
    Result rawResult3 = null;
    byte[] rotatedData = new byte[data.length];			// 찍은 이미지  데이터 반전. BOM 용도.
    for(int b=0;b <height; b++ ){								
    	for(int  a= 0; a <width; a++){
//    		rotatedData[(width - a) + (height-b)*width] = data[a + (b * width)];				// 상하 반전   + 좌우 반전..  이지만 정상 화면 사용할 것.
    		// 좌측은 끝에서부터.역순으로 쌓임.              // 우측은 정상 데이터
    		
    		// CaptureActivityHandler 클래스의 handleMessage 메소드 에서 화면을 돌렸기 때문에 아래의 코드를 사용한다. (돌리지 않았다면 위의 코드를 사용)
    		rotatedData[a + (height-b)*width] = data[a + b * width];				// 인식 못함--> 인식함.
    	}
    }
    PlanarYUVLuminanceSource source = activity.getCameraManager().buildLuminanceSource(data, width, height);				// 정상 화면
    PlanarYUVLuminanceSource source3 = activity.getCameraManager().buildLuminanceSource(rotatedData, width, height);			// 반전 화면. BOM 용도

    if (source != null) {
      BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
      try {
        rawResult = multiFormatReader.decodeWithState(bitmap);
      } catch (ReaderException re) {
        // continue
      } finally {
        multiFormatReader.reset();
      }
    }

    if (source3 != null) {		// BOM 용도
        BinaryBitmap bitmap3 = new BinaryBitmap(new HybridBinarizer(source3));		// BOM 용도
        try {			//BOM 용도
            rawResult3 = multiFormatReader.decodeWithState(bitmap3);
          } catch (ReaderException re) {
            // continue
          } finally {
            multiFormatReader.reset();
          }
      }
    
    Handler handler = activity.getHandler();
    if (rawResult != null) {
      // Don't log the barcode contents for security.
      long end = System.currentTimeMillis();
      Log.d(TAG, "Found barcode in " + (end - start) + " ms");
      if (handler != null) {
        Message message = Message.obtain(handler, R.id.decode_succeeded, rawResult);
        Bundle bundle = new Bundle();
        Bitmap grayscaleBitmap = toBitmap(source, source.renderCroppedGreyscaleBitmap());
        bundle.putParcelable(DecodeThread.BARCODE_BITMAP, grayscaleBitmap);
        message.setData(bundle);
        message.sendToTarget();
      }
    } else {
      if (handler != null) {
        Message message = Message.obtain(handler, R.id.decode_failed);
        message.sendToTarget();
      }
    }
    
    if (rawResult3 != null) {			// BOM 용
        // Don't log the barcode contents for security.
        long end = System.currentTimeMillis();
        Log.d(TAG, "Found barcode in " + (end - start) + " ms");
        if (handler != null) {
          Message message = Message.obtain(handler, R.id.decode_succeeded, rawResult3);
          Bundle bundle = new Bundle();
          Bitmap grayscaleBitmap = toBitmap(source, source.renderCroppedGreyscaleBitmap());
          bundle.putParcelable(DecodeThread.BARCODE_BITMAP, grayscaleBitmap);
          message.setData(bundle);
          message.sendToTarget();
        }
      } else {
        if (handler != null) {
          Message message = Message.obtain(handler, R.id.decode_failed);
          message.sendToTarget();
        }
      }
  }

  private static Bitmap toBitmap(LuminanceSource source, int[] pixels) {
    int width = source.getWidth();
    int height = source.getHeight();
    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
    return bitmap;
  }

}
